Method of treating soap



July 6, c, T W ER I 2,085,843

METHOD OF TREATING SOAP Original Filed Dec. 7, 1954 2 Sheets-Sheet l I37 l I l 40 28 I I 30 39 I I 29 II I II II 39 27 I 32 27 33 I 26 I I 25I 19a 86!. i 7

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METHOD OF TREATING SOAP Original Filed Dec. 7, 19:54 '2 Sheets-SheetC/idZZZJ 21 Walter INVENTOR ATTORNEY Patented July 6, 1937 UNITED STATESMETHOD 2,085,940 or TREATING soar Charles T. Walter, Chicago, 111.,assignor to Industrial Patents Corporation, Chicago, 111., a corporationof Delaware Original application December 7, 1934, Serial No.

Divided and this application April 13, 1935, Serial No. 16,213

1 Claim.

This invention relates to the treatment of soap.

This application is a division of my application entitled, Method oftreating soap and the product thereof, filed December 7, 1934, SerialNo. 756,472, which issued June .9, 1936 as Patent No. 2,043,686.

One of the objects of the invention is to provide a novel method oftreating tubular soap.

Other objects of the invention will be apparent from the description andclaims which follow.

In my application, Serial No. 703,350, filed December 21, 1933, entitledSoap product and method of making the same, and in my divisionalapplication, Serial No. 737,345, filed July 28, 1934, entitled Method ofmaking tube soap, which issued June 9, 1936 as Patent No. 2,043,685. Idescribe a novel form of soap which may be formed as thin-walled tubesor as ribbons.

As pointed out in my said applications and issued patents, I have foundthat tube or ribbon soap prepared in accordance withthe inventions theredescribed and claimed, may be given a glossy finish byheating the nozzleof the extrusion plate to a temperature of 160 to 180 Fah renheit.

The action of the heated nozzle would seem to produce a'skin eflfect onthe extruded soap, 8. very thin film of soap being heated and probablymelted. The depth of this. heating eifect is not suflicient tomaterially affect the strength of the extruded tube. After being incontact with cool air for a few seconds after leaving the extrusion die,the more or less molten outside film or skin solidifies into a smoothglossy surface which is thereafter retained indefinitely.

The nozzle of the extrusion die may be heated by means of a hot waterjacket around its lower end, which provides enough heat to the apparatusto compensate for the heat removed by the stream of soap flowing throughit, thus maintaining a constant temperature. Soap containing filler,heat treated as has just been described, gives every appearance of amilled soap not containing filler.

In carrying out the method of the present invention I prefer to use anextrusion device of the type described and claimed in my application,Serial No. 703,351, filed December 21, 1933, entitled Extrusion device,which issued June9, 1936 as Patent No. 2,043,682.

Although it will be understood that other means such as an electricalheating element may be used, I prefer to use hot water in a jacketedextrusion nozzle such as shown in the accompanying drawings.

Figure 1 is a sectional view of a preferred embodiment voi a waterjacketed'nozzle.

Figure 2 is asection on line 22 of Figure 1.

.on line 66 of Figure 1.

Referring now, more particularly, to Figures 1, 2, 5, andv 6:: Y

Within casing l is a chamber 2 into which soap in a plastic, semi-liquidcondition may be forced under pressure throughpipe 3 which is threadedin boss 4. Spindle 5 is rotatably mounted within 7 casing l andterminates in an extrusionpin 6. Bearing l is a thrust ball bearing andtakes the thrust load imposed on spindle-5' by virtue of the hydraulicpressure within chamber 2.

This thrust load is transmitted directly to bearing 7 byafiange 8 whichis integral with spindle 5, rotates in bushing 80, and isseparated frombushing i9, by washer l9m End plate 9 which is screwed into casing l bythreads hand which cooperates with casing l to form a hous-- ing, isprovided with extrusion orifice Ii and.

base of conical recess l2 in which fits conical end l3 of the spindle 5.Wrench recesses l4 and [5 are provided in end plate 9 to facilitateremoval and insertion of the end plate which serves as an extrusionplate.

End plate 9 is guided and held rigidly in a center position with respectto the body portion by means of cylindrical guiding portions i9 and IT.Shoulder l8 limits the depth to which the plate 9 may be screwed intothe casing l. Stufiing box I9 is a cast iron bushing having a press fitin the bore of the body, and acts as a bearing which performs the dualfunction of guiding the upper end of the spindle 5 in a radialdirection.

The bushing I9 is preferably machined on the inside so as to form a veryclose running fit with the enlarged portion 2| of the rotating spindleI. Stufling box bushing i9 has an internal groove 22 vented to theoutside surface of casing l by outlet opening 29, thus preventing soapfrom being forced from chamber 2 into the upper portion of the deviceabove hole 29.

Nut 24 is screwed into casing l by threads 25 and serves to carry thethrust transmitted through bearing I. It will be noted that nut 24 isdesigned to screw down solidly against shoulder 28. Flat surfaces arepreferably provided on the portion 21 of nut 24 to provide suitablebearing surfaces for a wrench. The upper extremity 28 of nut 24 ismachined to a smooth surface to provide a bearing for sprocket 29 whichcontains a suitable bronze bushing 30. Bushing 30 is designed to permitthe sprocket 28 to rotate freely about a bushing portion 28 of nut 24.The driving end 3| of spindle 5 passes up through a concentric hole 32in nut 24. A slight amount of clearance between the driving end 3| ofthe spindle and nut 24 is indicated at 33. The amount of clearance isnot important, it being merely desirable that driving end 3| of spindle5 does not contact the surface of concentric hole 32 innut 24 since nut24 is not utilized as a bearing for spindle 5. Flange 34 is firmlyattached to the upper end of spindle 5 as by keying or otherwise and issecured to sprocket 29 by bolts 35, 36, 31, and 38, whereby drivingforce is transmitted from sprocket 29 to spindle'5. Bending and shearingforces resulting from the chain drive on the teeth 39 of sprocket 29 areresisted by bearing 40 and are transmitted directly to the rigid body ofcasing l, and consequently only a pure torque is transmitted to thespindle. A breather hole 4i runs the entire length of spindle 5 with anopening at the end of extrusion pin 6.

A flange 42, having holes 43 and 44, is formed integral with-casing land is provided in order that the entire device may be bolted againstany suitable supporting member.

Casing I is provided with water jacket cham- 'ber 45 through which hotwater is circulated by wayof'pipes 46 and 41'.

In operation, plastic soap is forced under hydraulic pressure throughpipe 3 and thence into chamber 2. From chamber 2 the soap passes throughconical passage 12 which leads to the extrusion opening II and isdistributed uniformly around the spindle head l3, passing out extrusionorifice ll around extrusion pin 6.

Tube soap in the form illustrated in Figure 3 may be formed at the rateof one hundred feet per minute with the spindle rotating at the rate ofR. P. M. In such case it is suflicient merely to leave the breather tube4| open to prevent collapse of the tube. If it is desired to operate vthe tube to a flattened ribbon.

The preferred commercial form of the tube soap of the present inventionis a plurality of individual pieces having an outside diameter of from.07 to .09 inch and a wall thickness of from .0035 to-.0055 inch. Theindividual pieces may be from one-fourth inch to three-fourths inch inlength, being prepared by cutting, as desired, long tubes extruded fromthe extrusion device ln the manner already described.

In the production of the product of the present invention, hot water,preferably at a temperature of about 180 F. is circulated in waterjacket 4!, care being'taken to keep the water temperature fairlyconstant at that point. The soap enters the device at a temperature ofabout 70 F. or lower and is extruded in the form of a tube or ribbon asdesired. The heat from the water jacket is transmitted through the metalof the extrusion plate and the resulting instantaneous heating effectbrings about a highly glossed appearance in the product after extrusion.If desired steam or electricity could be used instead of hot water,suitable provision being made in the extrusion nozzle. This would appearto be the result of melting the outer surface of the tube as it is beingformed, permitting the surface particles to run together to form aglaze-like film exhibiting a high polish. The same result may be securedin like manner with the ribbon product.

I claim:

The method of forming soap which comprises extruding plastic soap stockat a temperature of about 70 F. in the form of tubes having wallsapproximately .0035 inch to .0055 inch in thickness and applying heat tothe outer surface of the tubes .at the instant of extrusion at atemperature from F. to F. to provide a glossy finish on the outersurface thereof.

CHARLES T. WALTER.

